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LibJS: Implement Temporal.Instant.fromEpochSeconds()
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@ -4,6 +4,7 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCrypto/BigInt/UnsignedBigInteger.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Temporal/InstantConstructor.h>
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@ -25,6 +26,9 @@ void InstantConstructor::initialize(GlobalObject& global_object)
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// 8.2.1 Temporal.Instant.prototype, https://tc39.es/proposal-temporal/#sec-temporal-instant-prototype
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define_direct_property(vm.names.prototype, global_object.temporal_instant_prototype(), 0);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.fromEpochSeconds, from_epoch_seconds, 1, attr);
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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@ -60,4 +64,30 @@ Value InstantConstructor::construct(FunctionObject& new_target)
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return create_temporal_instant(global_object, *epoch_nanoseconds, &new_target);
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}
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// 8.2.3 Temporal.Instant.fromEpochSeconds ( epochSeconds ), https://tc39.es/proposal-temporal/#sec-temporal.instant.fromepochseconds
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JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_seconds)
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{
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// 1. Set epochSeconds to ? ToNumber(epochSeconds).
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auto epoch_seconds_value = vm.argument(0).to_number(global_object);
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if (vm.exception())
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return {};
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// 2. Set epochSeconds to ? NumberToBigInt(epochSeconds).
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auto* epoch_seconds = number_to_bigint(global_object, epoch_seconds_value);
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if (vm.exception())
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return {};
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// 3. Let epochNanoseconds be epochSeconds × 10^9ℤ.
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auto* epoch_nanoseconds = js_bigint(vm.heap(), epoch_seconds->big_integer().multiplied_by(Crypto::UnsignedBigInteger { 1'000'000'000 }));
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// 4. If ! IsValidEpochNanoseconds(epochNanoseconds) is false, throw a RangeError exception.
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if (!is_valid_epoch_nanoseconds(*epoch_nanoseconds)) {
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vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
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return {};
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}
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// 5. Return ? CreateTemporalInstant(epochNanoseconds).
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return create_temporal_instant(global_object, *epoch_nanoseconds);
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}
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}
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